Hi,
That's complex.
The way the tax system works doesn't allow to add that easily.
First, different products can have different taxes. Second, taxes are calculated on listings, on the product page, etc, not just in the cart.
Also, even when calculating the taxes for a cart, it is done before the the prices are summed:
- prices are loaded
- taxes are calculated on these prices (different products can have different taxes)
- prices and taxes are summed
So the mechanism to select how to tax a price doesn't have the information of the cart total.
Now, could you provide more information about this minimum of 135£ ? Does it include shipping fees ? Payment fees ?
Coupons ?
I've found this information so far:
www.hellotax.com/blog/taxation/vat-thres...ll%20be%20introduced
.
I suppose the best would be to have a small plugin to implement one of the events triggered while the cart is being loaded to cancel the taxes on all the prices in the cart with a rule that can be configured in the settings of the plugin. That way, the plugin could take into account the price after the coupon is deduced and after the shipping fee is added, etc and it wouldn't mess with the whole structure of the tax calculation system in HikaShop.